Edward brick-son



(No Model.)

E. ERICKSON, SULB ROUNDING MACHINE. No. 591,593. l Patented Oct. 12,1897.

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UNITED STATESi PATENT OFFICE.

EDVARD ERICKSO, OEEOSTON, MASSACHUSETTS, ASSIGNOR TO THE FLAGG MANUFACTURING COMPANY, OF SAME PLACE.

.,{sgoLE-R'OUNDING MACHINE.l

sPEcI'FmATroNfrming part' of Letters lPatent No. 591,5s3, dated october 12, 1897.

y Application filed March 12, 1896. -Serial No. 582,902. (No model.)

To allwhmn it ntay concern.;

Be it known that I, EDWARD ERICKSON, of Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Sole-Rounding Machines, of which the following is a specification.

This invention relates to a sole-rounding machine of the character shown in Letters,

ing slide on the carrier and to the knifeholder. l Y

Of the accompanying drawings, forming a part of this specification, Figure 1 represents a top plan view of portions of a sole-rounding machine embodying my improvements. Fig. 2 represents a side view of the knife-holder. Fig. 3 represents a top view of a part of the machine. Fig. 4 represents a rear view of the knife-holder. Fig. 5 represents a section on line 5 5 of Eig. 4. Figj6 represents a section von line 6 6 of Fig. 5. Fig. 7 represents a section on line 7 7 of Fig. 1.

The same letters and numerals of reference indicate the same partsx in all the figures.

In the drawings, d represents a part of the supporting-frame.V

b represents the xed pattern, which is secured to the supporting-frame.

d represents the Xed cam-plate, which is secured to the frame immediately under the pattern and has an elliptical cam-groove d'.

h represents the driver, which rotates upon the supporting-frame and imparts motion to the knife-carrier to move the same about the pattern in a path determined by the shape of the groove d.

g represents the knife-carrier, which is adapted to slide on the upper surface of the Said machine comprises ay 'which reference may be had fora fuller description. Y

The rounding or trimming knife Q6 is 'secured to a knife block or holder g5, which is pivotally connected with the swinging end of an oscillating slide g7. Said slide is pivoted at g8 to an arm vor extension on the carrier g, the pivotal point g8 being arranged to permit a movement of the knife-holder and knife in the arc of a circle toward and from the patternV b. The slide g7 has on itsnnder side a segmental foot or shoe Q70, which slides on the upper surface of the carrier g. The slide g7 is pressed yieldingly inward to hold the knife in yielding contact with the pattern by a spring gg, acting on the slide through a gear or pinion glo, the shaft Q12 of which is journaled in bearings on the carrier g, and a gearsegment Q13, formed on the slide Q7 and meshing with the said pinion. One end of the spring g is affixed to the carrier g and the other end to the pinion glo, the spring being arranged to rotate the pinion and `move the slide g' in the direction indicated by the arrows in Fig. 1. The pinion g10 maybe locked to hold the slide and knife away from thepattern when it is 'so desired by means of a dog g, pVG at 9.1.5 and formed to engage the teeth of the pinion and lockvthe"latter, so that the operator may rst pull back the slide g7 until the knife is separated fromthe pattern and then lock the slide'to hold the knife in its retracted position.;

. The knife blockV or holderl g5 has a flat bottom surface adapted tomove upon the flat top surface of the slide Q7 and a slot "3, formed to receive a headed stud 4, affixed to said slide, one end of the slot being closed and forming a bearing-surface adapted to rock on the stud to give the knife-holder the freedom of movement required to enable the knife to follow IOC the curves of the pattern, the stud and the closed end of the slot constituting a pivotal connection between the slide Q7 and the knifeholder. At the same time the slot, which is open at the rear side of the knife-holder, enables the knife-holder to be readily removed from the slide by irst moving the latter away from the pattern and then slipping the knifeholder from the stud by moving it forward toward the pattern, there being no positive connection between the knife-holder and the slide.

The knife-holder comprises a bottom section or base 2, in which the slot 3 is formed, and an adjustable top section 5, having a dovetail projection 6, movable between guides 7 7 on the section 2, said top section being movable in the direction required to adjust the cutting edge of the knife forward and compensate for its wear, it being desirable that the cutting edge be kept as close as possible to the center of the independent swinging motion of the knife-holder on the slide g7. rlhe knife g6 is formed on orafiixed to a shank S, which is secured to the adjustable section by gibs 9 10 on said section, the gib 10 being movable and secured by a screw 12. 13 represents an adjusting-screw having a screwthread connection with the adjustable section 5 and engaged with the section 2 by means of a collar 14 on the screw and a shoulder 15 on said section, so that rotation of the screw adjusts the section 5 and the knife. It will be seen that the rotation of the driver 7L moves the tool-carrier g about the pattern, the camgroove d guiding the tool-carrierin its course. The pivotal connection of the tool-holder-supporting slide to the toolcarrier enables said slide to move in and out as required by the curves of the pattern with but little frictional resistance as compared with a slide having a rectilinear movement between straight guides on the carrier. The connection between the spring and the swinging end of the slide Q7 through the pinion glo and rack-segment g13 enables the spring to be compactly arranged in spiral form and at the same time to exert its force advantageously on the slide 97.

I claim- 1. In a sole-rounding machine of the character specified, the combination with the fixed pattern, the xed cam-plate, and the rotary driver, of the knife-carrier engaged as described with the cam-plate and driver, a slide pivoted at one end to the carrier and having a rack-segment at its swinging end, a pinion journaled on the carrier and meshing with the said segment, a spring arranged to impel the pinion, a locking device on the carrier adapted to lock said pinion, and a knifeholder engaged with the swinging end of the slide.

2. In a sole-rounding machine, the combination with the spring-pressed slide having a stud, of a knife-holder having a slot which is open at the rear side of the holder to receive said stud and has a closed end within the holder forming a bearing for the stud.

3. In a sole-rounding machine, the combination with the spring-pressed slide having a stud, of a knife-holder having a slot which is open at the rear side of the holder to receive said stud and has a closed end within the holder forming a bearing for the stud, a knife secured to said holder, and means for adjusting the knife relatively to the said bearing.

In testimony whereof I have signed my naine to this specification, in the presence of two subscribing witnesses, this 10th day of. March, A. D. 1896.

EDVARD ERICKSON.

Vitnesses:

C. F. BROWN,- A. D. IIARnIsoN. 

